I was making this up as I went, so I didn't really check how much fabric I used. It was just what I had available. So I'm pretty sure my list will be more than enough for you.
*A basic knowledge of how to sew with a needle
and a machine
. I'm far from an expert on sewing, but I made it work.
*It may help to study how to sew a cube
*Basic sewing supplies, including a sewing machine. I also used a serger, but that is optional.
*A [http://www.instructables.com/id/Cheap-Light-Box-for-drawing-or-inking-or.../ light box] is helpful, but optional.
*About a yard of yellow or orange fleece (you can use other materials if you like, but fleece is really soft).
*About a yard of gray fleece.
*About a half a yard of black fleece.
*A scrap of blue or black satin (about 8" square or so).
*Two very large buttons (At least 1")